Mobile machine



April 14, 1931. c.| E. DAVIS 1,300,379

' MOBILE MACHINE Original Fild Aug. 5, 1926 6 Sheets-Sheet l C. E. DAVISMOBILE MACHINE April 14, 1931.

Original Filed Aug. 5, 1926 "6 Sheets-Sheet 2 April 14, 1931. c. E.DAVIS 1,300,379

MOBILE MACHINE Original Filed Aug. 5, 1926 6 Sheets-Sheet 3 N Q U mmwnnu v mm W J 'April 14, 1931. c. E. DAVIS 1,800,379

MOBILE MACHINE Original Filed Aug. 5, 1926 6 Sheets-Sheet 4 7 510610101d A6 3 (la/"lei avg) 34M 7 cw' 5} Q April 14, 1931- c. E. DAVIS1,800,379

MOBILE, MACHINE Oi-igiual Filed Aug- 5, 1926 6 Sheets-Sheet 5 April 14,1931'. c; E. DAVIS 1,800,379

MOBILE MACHINE I Original Filed Aug. 5, 1926 6 Sheets-Sheet 6 Jive/afar"CAM! 19 out the several figures.

Patented App 14, 1931 UNITED sraes PATENT OFFICE CHARLES E. DAVIS, OFDAVENPORT, FLORIDA, ASSIGNOR T GOODMAN MANIIFACTUR-,

ING COMPANY,'OF CHICAGO, ILLINOIS, ACOBPORATION OF ILLINOIS MOBILEMACHINE Original application filed August 5, 1926, Serial 110,127,301.Divided and this application filed November v I r .5, 1927. Serial No.231,228. I t

- This invention relates particularly to power shovels for use inconfined spaces, such as in mines, although not limited to this usealone.

7 One of the objects of the invention resides in providing a machine,adapted for propulsion, which may be turned abruptly or have itsdirection of propulsionchanged within a relatively small space withobvious advanta-ge particularly as relates to underground power shovels.1 v

Other objects reside in the provision of a machine of the abovecharacterwith a view toward compactness, effective operation and propercontrol.

Referring now to the drawings:

Figure 1' is a top plan view of a power shovel embodying one form of myinvention, with parts broken away and in section and inter'mediatelybroken and longitudinally condensed; V I 9 Figure 2 is-a side elevationof the machine ,illustrated in Figure 1 with parts broken away and insection; v

Flgure 3 1s a side elevat on of the mach ne illustrated in Figure lshowing the side of the machine opposite that which is shown in Figure 2and with'parts broken away and in section;

Figure 4 is a transverse vertical sectional view of the main portion ofthemachine on the line l-l of Figure 1 and with one of the continuoustread mechanisms in elevation and partially-broken awayand with theother continuous tread mechanism in transverse section;

Flgure 5 1s a diagrammatic View of the machine showing a part thereof ina different position than that in which it is shown in Figures 2 and 1;and

Figure 6 is a partial section on line 6 6 of "Figure 1.

Like numerals refer to like parts through In the drawings 1 designates abase frame which is carried on laterally spaced continuous tread devices2 of usual construction which are adapted for the propulsion of theshovel. 7

1 The base frame 1 is provided with a cenhub 3 extending upwardlytherefrom. A turntable or rotatable frame 41's carriedon with respect tothe base by means of a bored hub 5 formed integrally with the turntableand extending upwardly therefrom and journaled on the hub 3 of the baseand a stepped hub of a gear 6 secured on an intermediate portion of thehub 3 the web ofthis gear forming a downward thrust bearing for theturntable and a ring 7 screwthreaded on the trally. disposedconcentrically bored vertical the base frame and is journaled on saidhub 3 for angular movement in a horizontal plane upper end of the hub 3forming an upward thrust bearing for the turntable. See par- 7 disposedon respective sides of the hubs 3 and '5 of the base frame 1 and theturntable 1 respectively, and a scoop beam 11 comprising laterallyspaced parallel channel members 12 has these channel members mounted forlongitudinal movement onrespective arms of the inner elevating frame'9.A forwardly facing scoop 13 is carried onthe front end of the beam 11. Areaction beam15 comprising laterally spaced parallel members 16 hasthese members mounted for longitudinal movement onrespective arms of theouter elevating frame 10. I

The operation of the beams 11 and15 or the detailed structure relatingthereto re quires no further description for the present purposes,they'being fully described and features thereof claimed in my co-pendingapplication, Serial No. 127 ,301, filed August 5, 1926, forimprovementsin power shovels, of which the present application is adivision. I

Mounted on the elevating frame 9 adjacent its rear and above the beam-11is an electric motor 21, and this motor drives, by means of a reducinggear train 22, a horizontal' transversely disposed shaft 23 journaled onthe top of the frame 9-and on lateral present purposes.

Mounted on the right hand portion of the shaft 23 between the frame 9and the right 7 hand extension 24 thereof is a pair of' manuallycontrolled releasable frictional drive devices 61 of the planetary type,which are conected to drive a horizontal transversely disposed shaft 62journaled in an extension 63 of the elevating frame 9 adjacent its rearend by means of two reducing gear trains 64, one of which gear trainsincludes an additional idler gear 65 whereby the shaft .62 is driven inrespective directions by the driving devices 61. See Figures 1 and 6.

The frames 9 and 10 are journaled for pivotal movement in a verticalplane on the transmission shaft 8which is journaled on brackets 27extending rearwardly from the turntable 4. Secured. on the shaft 8 is agear 82 which meshes'with the gear of one of the gear trains 64 securedto the-shaft 62. See Figures 1 and 3. Thus the shaft 8 may be driven ineither direction from the motor 21 by means of the driving devices 61and the gear trains 64 in a manner that permits pivotal movement of theelevating frame 9 with respect to the turntable.

y The turntable 4 is operated angularly about its vertical axis by themotor 21 and through the shaft 8 in the following manner. See Figures 1and 2. A shaft 83 is journaled on the-rear portion of the turntable andis disposed radially with respect thereto. 'Secured on the rear end ofthe shaft 83 is a bevel gear 84 which meshes with a bevel gear 85secured on the shaft 8, whereby the shaft 83 is driven from the shaft 8.The hereinbefore mentioned gear 6 is an upwardly facing bevel gear, andjournaled on the turntable and on the front end of theshaft 83 is abevel gear 86 which meshes with the gear 6. The gear 86 is driven fromthe shaft 83 by means of a manually controlled releasable positiveclutch 87 of usual construction.

' Thus, assuming the clutch 87 is engaged,

the turntable may be operated in either direction by the motor 21 bymanipulation of the driving devices 61.

The continuous tread devices 2 are operated for the propulsion of themachine'by the motor 21 and through the shaft 8 in the following manner;See Figuresl, 2 and 5. Journaled for rotation on the hub 3 of the baseframe 1 between the main portion of the base frame and the hereinbeforementioned gear 6 is a large bevel gear 89 having both upwardly anddownwardly facing teeth. A horizontal transversely disposed shaft 90 isjournaled on one side of the turntable 4 on an axis intersecting theaxis of the turntable, and a bevel gear 91 is secured on this shaft andmeshes with the upwardly facing gear teeth of the gear 89. Two alignedsprockets 92 are secured respectively on the shafts 90 and 8, and achain 93, see Figures 1 and 5, is trained over these sprockets fordriving the shaft 90 from the shaft 8 and through the gear 91 drivingthe gear 89. A horizontal transversely disposed shaft 94, disposedradially of the gear 89, is journaled on the base frame 1 at one sidethereof, and, a bevel gear 95 is secured on this shaft and mesheswiththe downwardly facing gear teeth of the gear 89. A sprocket 96 issecured on the shaft 94 anda second sprocket 97 is rotatably mounted inalignment with the sprocket 96 on a driving shaft 98 of the continuoustread devices 2. A chain 99 is trained over the sprockets 96 and 97 fordriving the sprocket 97 from the gear 89, and a manually controlledreleasable positive clutch 100 of the usual construction fixes thesprocket 97 with the shaft 98 for driving the continuous tread devices 2from the motor 21. Thus, assumingthe clutch 100 is engaged, thecontinuous tread devices 2 may be operated in either direction from themotor 21 by manipulation of the driving devices 61. l

A means is provided whereby the machine may be turned abruptly or haveits direction of propulsion changed within a relatively small space andconsists of the following: See Figures 4 and 5. A centrally disposedsupport member 102 isdisposed underneath the base frame 1 between thecontinuous tread devices 2 and is engageable with the supporting floorfor carrying the machine.

posed underneaththe base frame land rotatably mounted thereon by meansof/a suitable bearing 105, is screwthreaded upon the lower portion ofthe shaft 103 so that rotation of this gear with respect to this shafteffects relative vertical adjustment between the support member 102 andthe base frame '1 carrying the continuous'tread devices.

When it is desired to turn the machine the support member 102 isoperated downwardly by rotation of the gear 104 in the proper directionuntil the support member engages with the supporting floor and lifts thebase frame 1 to a position in which the continuous tread devices 2aredisengaged with the supporting floor, as shown in Figure 5, in

moved angularly about the support member and shaft to any desiredangular position. After the base frame 1 is positioned the bevel gear104 is operated in the opposite direction to again engage the continuoustread devices 2 with the supporting floor and to dis engage the supportmember 102 from the supporting floor and to return it to its normalposition elevated from the supporting floor as shown in Figure 4. a

The bevel gear 104 is operated and the base frame 1 is operatedangularly with respect to the support member 102 from the motor 21 inthe following manner:

The gear 89 is driven from the shaft 8 in the manner hereinbeforedescribed, the shaft 8 being driven in either direction from the motor21 through the driving devices 61 and gear trains 64. A horizontal shaft106 is journaled on the base frame 1 at the front thereof on an axisintersecting the axis of the turntable, 4 and shaft 103. Secured on thisshaft 106 is a bevel gear 107 which meshes with the bevel gear 104 fordriving the same.

Journaled on the shaft 106 is another bevel gear 108 which meshes withthe downwardly facing teeth of the hereinbefore mentioned gear 89, and amanually controlled releasable positive clutch 109 of usual constructionfixes the gear 108 with the shaft 106 for driving the gear 104 forvertically adjusting the support member 102. Thus, assuming the clutch109is engaged the bevel gear 104 may be operated in either directionfrom the mo- I tor 21 by manipulation of the driving de vices 61.

In order to prevent angular movement of the turntable 4 by reasonofreaction caused in the driving of the continuous tread mechanisms 2 aremovable stud 111 is engaged in registering radial bores in the hubs 3and 5 respectively of the base frame 1 and turn table 4, it beingobvious that this stud is removed when it. is desired to operate theturnr table on the base frame or vice versa as when in a keyway 115 onthe shaft 103 to rotatably fix this clutch member and shaft. The lowerend of this keyway engaging the key 114 limits downward movement of theclutch member 113 with respect to the shaft 103.

so that when thesupport member 102 is in its normal upper position, asshown in Figure 4, the clutch member 113 is disengaged from theturntablethereby permitting the turntable 'to turn independently of thesupport member-102 and shaft 103. The hubof the clutch member-113 isprovided with a radial bore 116 for the insertion of a removable bar,indicated by dotted line at 117 in V gagement of the clutch 87 andmanipulationof the driving devices 61.

her 113 engaged with the clutch teeth 112- The clutch memprovides forthe reaction on the turntable caused by the turning of the base frame 1by fixing the turntable with the support member 102 engaged on thesupporting floor.

teeth 112 also provides for the reaction of the operation of the gear104.

While I have herein shown anddescribed The clutch member 113' engagedwith the clutch one form of my invention, I do not wish to be limited tothe precise details of construction or arrangement of parts herein shownand-described except as'specifically limited in the appended claims. 4

I claim as my'invention:

the combination of a-base, a pair of laterally mounted on said'base andcarrying the same, a centrally disposed support member between saidpropulsion devices andengageable with a'fioor; for carrying said baseand with respect to which said base is angular-1y movable. on

a centrally disposed vertical axis, a revoluble gear disposed on" saidaxis for vertically adjus'ting said support member with respect tov saidbase for alternate engagement of said propulsion means and said supportmember 1'. In a machine of the character described,

lspaced continuous tread propulsion means 7 with'the floor, a poweroperated revoluble gear disposedon said axis, a third gear rotatablymounted on said base and meshing iwith said second mentioned gear,releasable I clutch means for driving said propulsion devices from saidthird gear, a fourth gear rotatably mounted on said base and meshingwith saidsecond mentioned gear, a fifth gear rotatably mounted on saidbase and meshing with said first mentionedgear, and a second" releasableclutch means for driving said fifth gear from said fourth gear.

2. In a power shovel, the'combinatio'n of a base frame, propulsion meanscarrying said base frame for propulsion, a turntable mounted on saidbase frame for movement ina horizontal plane, a gear disposed coaxiallywith said turntable and secured with said 'bas eframe, a second gearrotatably mounted on said turntable and meshing with said firstmentioned gear for operating said turntable,

a third gear rotatably mounted and disposed coaxially with saidturntable, a fourthgear rotatably mounted 011 said turntable and meshingwith said third gear for driving the same, and a fifth gear rotatablymounted on said base frame and meshing with said third gear for drivingsaid propulsion means.

' 3. In a power shovel, the combination of a base frame provided with acentrally disposed hub extending upwardly therefrom, propulsion meanscarrying said base frame for propulsion, a turntable above said baseframe and journaled about said hub for angular movement, a gear disposedcoaxially with and secured on said hub below said turntable, a secondgear rotatably mounted on said turntable and meshingwith said first menvtioned gear for operating said turntable, a

third gear journaled on said hub below said 7 first mentioned gear, afourth gear rotatably mount-ed on said turntable and meshing with saidthird gear for driving the same, and a fifth gear rotatably mounted onsaid base frame and meshing with said third gear for driving saidpropulsion means therefrom.

4. In a power shovel, the combination of a base frame provided with acentrally disposed hub extending upwardly therefrom, propulsion meanscarrying said base frame for propulsion, a turntable above said base andjournaled about said hub for angular movement, an upwardly facing bevelgear disposed coaXially with and secured on said hub below saidturntable, a second bevel gear rotatably I mounted on said turntable andmeshing with said first mentioned gear for operating said turntable, athird bevel gear larger than said first mentioned gear and provided withupwardly and downwardly facing teeth and journaled on said hub belowsaid first me'ntioned gear, a fourth bevel gear 7 rotatably mounted onsaid turntable and meshing with theupwardly facing teeth of said thirdgear for driving the same, and a fifth gear rotatably mounted on saidbase frame and'meshing with the downwardly facing teeth of said thirdgear for. driving said propulsion means therefrom.

Signed at Chicago, in the county'of Cook andState of Illinois, this 1stday of Novemher, A. I). 1926.

CHARLES E. DAVIS.

